Human equilibrium on unstable support: the importance of feet-support interaction

Ivanenko, Yuri P.; Levik, Yu. S.; Talis, V. L.; Gurfinkel, V. S.

doi:10.1016/s0304-3940(97)00721-0

Cited by 87 publications

(66 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to Ivanenko, Levik et al (1997), when standing on a rocking support (seesaw), the CoM deviation is accompanied by changes in ankle movement pattern and plantar pressure distribution, which are compensated by gastrocnemius muscle activation as in this condition, instead of moving the CoM, subjects shift the point of contact of the rocking platform with the ground under the CoM. Nigg, Hintzen et al (2006) reported an increase only for the TA during standing with the unstable shoe, when compared to the conventional shoe.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, measurements made with the unstable test shoe after training revealed significantly higher venous return than barefoot measurements. According to Ivanenko, Levik et al (1997), during overground standing the triceps surae muscles generally work in an eccentric mode of contraction, and on the seesaw in a concentric one. Unstable shoe sole configuration is similar to the seesaw used in (Ivanenko, Levik et al, 1997), and therefore it can be assumed that it also favours concentric activity.…”

Section: Discussionmentioning

confidence: 99%

“…According to Ivanenko, Levik et al (1997), during overground standing the triceps surae muscles generally work in an eccentric mode of contraction, and on the seesaw in a concentric one. Unstable shoe sole configuration is similar to the seesaw used in (Ivanenko, Levik et al, 1997), and therefore it can be assumed that it also favours concentric activity. These findings may explain why, despite MG neuromuscular adaptation, the venous flow remained higher while wearing the unstable test shoe, as most of the venous return occurs during the concentric phase of contraction (Hogan, Grasse et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of wearing an unstable shoe on thigh and leg muscle activity and venous response in upright standing

et al. 2012

View full text Add to dashboard Cite

Purpose: To quantify the effect of unstable shoe wearing on muscle activity and haemodynamic response during standing.Methods: Thirty volunteers were divided into 2 groups: the experimental group wore an unstable shoe for 8 weeks, while the control group used a conventional shoe for the same period. Muscle activity of the medial gastrocnemius, tibialis anterior, rectus femoris and biceps femoris and venous circulation were assessed in quiet standing with the unstable shoe and barefoot.Results: In the first measurement there was an increase in medial gastrocnemius activity in all volunteers while wearing the unstable shoe. On the other hand, after wearing the unstable shoe for eight weeks these differences were not verified. Venous return increased in subjects wearing the unstable shoe before and after training. Conclusions:The unstable shoe produced changes in electromyographic characteristics which were advantageous for venous circulation even after training accommodation by the neuromuscular system.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of wearing an unstable shoe on thigh and leg muscle activity and venous response in upright standing

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Nevertheless, the functional role of specific groups of sensory receptors in regulating human locomotion is still uncertain because they cannot be easily separated since they interact with each other and with central rhythm-generating centers in a complex manner. In addition, support surface and contact with a ground may also be included as components of our ego space in a similar way as external objects and tools can be included in our body scheme (Berti & Frassinetti, 2000;Iriki, Tanaka, & Iwamura, 1996;Ivanenko, Levik, Talis, & Gurfinkel, 1997;Solopova, Kazennikov, Deniskina, Levik, & Ivanenko, 2003).…”

Section: Introductionmentioning

confidence: 99%

A novel approach to mechanical foot stimulation during human locomotion under body weight support

Gravano

Ivanenko

Maccioni

et al. 2011

Human Movement Science

Self Cite

View full text Add to dashboard Cite

a b s t r a c tInput from the foot plays an essential part in perceiving support surfaces and determining kinematic events in human walking. To simulate adequate tactile pressure inputs under body weight support (BWS) conditions that represent an effective form of locomotion training, we here developed a new method of phasic mechanical foot stimulation using light-weight pneumatic insoles placed inside the shoes (under the heel and metatarsus). To test the system, we asked healthy participants to walk on a treadmill with different levels of BWS. The pressure under the stimulated areas of the feet and subjective sensations were higher at high levels of BWS and when applied to the ball and toes rather than heels. Foot stimulation did not disturb significantly the normal motor pattern, and in all participants we evoked a reliable step-synchronized triggering of stimuli for each leg separately. This approach has been performed in a general framework looking for ''afferent templates" of human locomotion that could be used for functional sensory stimulation. The proposed technique can be used to imitate or partially restore surrogate contact forces under body weight support conditions.

show abstract

“…Standing on an unstable platform is inherently difficult for healthy individuals since the subject should align their CoM projection on the contact point of the unstable platform with ground (Cimadoro et al 2013, Ivanenko et al 1997). This condition requires increased activation of leg muscles to control the posture (Cimadoro et al 2013).…”

Section: Discussionmentioning

confidence: 99%

Effects of postural and cognitive difficulty levels on the standing of healthy young males on an unstable platform

Oliaei¹,

Ashtiani²,

Azma³

et al. 2018

Acta Neurobiologiae Experimentalis

View full text Add to dashboard Cite

Standing on an unstable platform requires continuous effort of the neuro-musculoskeletal system. The aim of the present study is to evaluate the ability to remain standing on an unstable platform at different levels of postural and cognitive difficulty. Healthy young males stood in the sagittal plane on an unstable platform supported by a pair of springs with modifiable stiffness. The balance test also assessed different levels of vision and cognitive function. Linear and nonlinear metrics of standing, based on motion captured kinematic data, were assessed to analyze the stability of standing. Results showed that vision plays a significant role in maintaining balance in terms of linear metrics. Elimination of visual feedback changed the direction of body sway and increased standing instability. Placement of low stiffness springs led to unstable standing. The cognitive dual task, however, had no effect on the stability metrics and merely could be revealed in the simplest test condition. Standing on an unstable platform was closely related to visual feedback and decreasing the spring stiffness significantly reduced stability. The roles of cognitive involvement were subdued by increasing the postural difficulty in standing on an unstable platform.

show abstract

Human equilibrium on unstable support: the importance of feet-support interaction

Cited by 87 publications

References 8 publications

Influence of wearing an unstable shoe on thigh and leg muscle activity and venous response in upright standing

Influence of wearing an unstable shoe on thigh and leg muscle activity and venous response in upright standing

A novel approach to mechanical foot stimulation during human locomotion under body weight support

Effects of postural and cognitive difficulty levels on the standing of healthy young males on an unstable platform

Contact Info

Product

Resources

About